Detailed introduction to the encryption and decryption methods of Vim text in CentOS

CentOS uses vim/vi to encrypt and decrypt files

1. Use vim/vi encryption:

Advantages: After encryption, if you don’t know the password, you can’t see the plain text, even the root user can’t see it;

Disadvantages: It is obvious that letting others know that it is encrypted will easily allow others to destroy the encrypted files, including content destruction and deletion;

I believe everyone is familiar with the vi editor. There is a command in vi that encrypts files. Here is an example:

1) First create an experimental file text.txt in the root home directory/root/:

[root@www ~]# vim/vi text.txt

2) Enter the editing mode, press ESC after entering the content, then enter: X (note the capital X), and press Enter;

3) At this time, the system prompts you to enter the password twice, as shown below:

enter password: *******

Please enter again: *******

4) Exit after saving. The file is now encrypted;

5) Use cat or more to view the file content, and it will be displayed as garbled characters; use vim/vi to re-edit the file, and you will be prompted to enter a password. If the entered password is incorrect, it will also be displayed as garbled characters!

Note: After encrypting the file, don’t forget the password!

2. Decrypt files encrypted with vi (provided you know the encrypted password):

1) Use vim/vi to open a file such as text.txt, enter the correct password, and then set the password to empty when editing by entering the following command:

：set key=

Then press Enter directly. After saving the file, the file has been decrypted.

2) Or this will work:

After opening the file correctly, use the ":X" command and then give an empty password. Save using "wq!".

The two methods actually have the same effect.

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